package com.pleague.common.utils;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.SimpleTimeZone;
import java.util.UUID;

public class IDUtils {

	public static String[] chars = new String[] { "a", "b", "c", "d", "e", "f",
			"g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s",
			"t", "u", "v", "w", "x", "y", "z", "0", "1", "2", "3", "4", "5",
			"6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I",
			"J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V",
			"W", "X", "Y", "Z" };

	public static String[] numbers = new String[] { "0", "1", "2", "3", "4",
			"5", "6", "7", "8", "9" };

	private static final String ISO8601_DATE_FORMAT = "yyyyMMdd";

	private static final SimpleDateFormat dfdate = new SimpleDateFormat(
			ISO8601_DATE_FORMAT);

	public static String generate() {

		return UUID.randomUUID().toString();
	}

	public static String generateUUID() {
		dfdate.setTimeZone(new SimpleTimeZone(0, "GMT"));
		StringBuffer shortBuffer = new StringBuffer();
		shortBuffer.append(dfdate.format(new Date()));
		String uuid = UUID.randomUUID().toString().replace("-", "");
		for (int i = 0; i < 8; i++) {
			String str = uuid.substring(i * 4, i * 4 + 4);
			int x = Integer.parseInt(str, 16);
			shortBuffer.append(chars[x % 0x3E]);
		}
		return shortBuffer.toString();

	}

	public static String generateUUNO() {
		dfdate.setTimeZone(new SimpleTimeZone(0, "GMT"));
		StringBuffer shortBuffer = new StringBuffer();
		shortBuffer.append(dfdate.format(new Date()));
		String uuid = UUID.randomUUID().toString().replace("-", "");
		for (int i = 0; i < 8; i++) {
			String str = uuid.substring(i * 4, i * 4 + 4);
			int x = Integer.parseInt(str, 16);
			shortBuffer.append(numbers[x % 0x0a]);
		}
		return shortBuffer.toString();

	}

}
